| Title |
A Color Temperature and Illuminance Controllable LED Lighting System |
| Authors |
Hoon Kim ; Jea-Kyoung Youm ; Won-Sup Chung ; Hee-Jun Kim |
| Keywords |
Lighting ; Lighting Control ; LED Lighting ; LED |
| Abstract |
This paper presents an LED lighting system with an LED color control algorithm that can independently change its color temperature and illuminance. To show the validity of the proposed algorithm, it is proven that its solution always exists. The proposed algorithm was applied to the control of an LED module that is composed of red, green, blue, and white (RGBW) LEDs. Its color temperature variation ranged from 3,500～7,500[°K], and its illuminance ranges from 500～1,500[lux]. Within these range, the color temperature and illuminance deviations are as low as ±0.8[%] when the junction temperature of LEDs are maintained at 40[℃]. In the range of 30～70[℃], the measured illuminance and color temperature deviations are as low as 2.1[%] and 3.6[%], and the compensated ones are as low as 1[%] and 0.49[%], when the desired illuminance and color temperature are 1,000[lux] and 6,500[°K], respectively.nyang.ac.kr). |